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Two sources of equal emf are connected t...

Two sources of equal emf are connected to an external resistance R. The internal resistances of the two sources are `R_1` and `R_2,(R_2 gt R_1)` If the potential difference across the source having internal resistance `R_2` is zero then :

A

`1 Omega`

B

`2/3 Omega`

C

`2 Omega`

D

`6 Omega`

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The correct Answer is:
A
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